package org.learn.test;

public class HomeWork07 {
    public static void main(String[] args) {
        double sum = 0;
        for(int i = 1; i <= 100; i++){
            if(i % 2 ==0){
                sum -= (1.0 / i);
            }else{
                sum += (1.0 / i);
            }
        }
        System.out.println("所求结果=" + sum);
    }
}
